Buff wheel and spacing device therefor



Feb. 23 '1926.

H. L. ZUCKER BUFF WHEEL AND SPACING DEVICE THEREFOR Filed Sept. 26, 1921gamma Wot Patented Feb. 23, 1926.

UNITED STATES PATENT OFFICE HENRY L. ZUGKER, 0F MATAWAN, NEW JERSEY,ASSIGNOR TO A. P. MUNNING & C0,, OF NEW YORK, N. Y., A CORPORATION OFNEW JERSEY.

BUFF WHEEL AND STAGING DEVICE THEREFOR.

Application filed September 26, 1921. Serial No. 503,465.

To all whom it may concern:

Be it known that I, HENRY L. ZUCKER, a citizen of the United States,residing at Matawan, in the county of Monmouth and State of New Jersey,have invented certain new and useful Bufi' Wheels and Spacing DevicesTherefor, of which the following is a specification.

The invention comprises a spacing device adapted .to be interposedbetween buliing or polishing wheel sections, when a number of the latterare mounted upon a spindle to make up a wheel having a wide workingface.

One object of the invention is to prevent undue heating of the sectionsin the use of a wheel of the above character, by providing adequate aircirculation between the same.

Another object is to provide a spacing device which will hold adjacentsections firmly against relative angular displacement, or movementoff-centre to an eccentric position.

Another object is to construct the spacing device in such manner thatthe compactness or stiffness of the working surface of the wheel may beregulated.

Still another object is to provide a spacing device which will beeffective to relieve the strains resulting from the use of the wheelupon work tending to bend the sections out of their natural shape.

Further objects and advantages of the invention will be in part obviousand in part specifically pointed out in the description hereinaftercontained, which, taken in connection with the accompanying drawings,discloses a preferred embodiment thereof; such embodiment, however, isto be considcred merely as illustrative of its principle. In thedrawings:

Fig. 1 is a central section showing several buff wheel sections mountedupon a spindle, with spacing devices constructed in accordance with theinvention; interposed between the sections.

Fig. 2 is a plan view of a spacing device shown detached.

Fig. 3 is a section on line 33 of Fig. 2.

In the use of bufling or polishing wheels made up from layers of wovencloth, flannel, hides, etc., it is usual to employ wheels ofcomparatively small thickness, and where a wheel with a wide cuttingface is desired,

to mount a number of the thin wheels or wheel sections together upon aspindle, thus making a complete wheel of any desired thickness. However,when a number of wheel sections are assembled in the manner abovedescribed, the cooling effect of the surroundin air upon the wheel isdecreased, particu arly as regards the interior sections, with theresult that the wheel is liable to become overheated in use. Also thesections tend to slip angularly relative to each other when the work ispressed tightly against the wheel, and in some instances the strainstend to wear away the centre holes of individual sections, permittingthe same to shift to an eccentric position which destroys the evennessof the wheel face.

According to the present invention, a spacing device is provided whichmay be interposed between the wheel sections to avoid one or moredifliculties such as are above mentioned, but it will be obvious thatall of the features of the invention need not be conjointly employed.

Referring to the drawings, I have shown in Fig. 1 a portion of a spindle1, upon which are mounted a plurality of buff wheel sections 2, thesections being clamped in position by any suitable means, such as a nut3 shown in Fig. 1 as working on the threaded end of spindle 1, andbearing against a collar 4, between which collar and some suitableabutment (such as the opposing collar 5 indicated by dotted lines inFig. 1) the wheel sections 2 may be clamped as firmly as desired bytightening up the nut 3. The above-mentioned parts being more or lessconventional will not be described in greater detail.

The spacing devices (indicated generally by numeral 6) are designed tobe interposed between adjacent wheel sections in the manner indicated inFig. 1, each spacing device being in the form of an annular memberhaving a central hole 7 therein to enable the same to he slipped overthe spindle 1. In order to hold the sections firmly againstdisplacement, the spacing member 6 is provided with a raised portion 8on one side adapted to engage the side of the butt wheel sectionadjacent thereto, and the remaining side of the spacing device isprovided with a depressed ortion 9 substantially com lementary to t eraised portion. Thus w en several wheel sections and spacing devices areassembled "together and the wheel clamped up, the raised portion 8 ofone spacing device tends to force the adjacent portion of a wheelsection into the depressed portion 9 of the adjacent spacing device, andthe wheel section is bowed more or less as indicated in Fig.1, dependingupon the degree of lateral pressure applied through nut 3 in clamping upthe sections. Thus each wheel section is locked in position, so tospeak, and the bending action efi'ected by t e spacing devices opposesstrongly any tendency of a section to rotate relative thereto.Furthermore, the wheel sections are held adequately against movement toan eccentric position due to distortion of their centre holes, since thebowing or bending of the material of the sections by the raised anddepressed portions 8 and 9' presents eflective resistance to suchmovement.

The spacing device may further be re-' versely curved to provide raisedand despectively opposite to those having the firstmentioned raised anddepressed portions 8 and 9. As illustrated, the outer edge of thespacing device is curved to provide a raised portion 10 on the-side ofthe member 6 which contains the depressed portion 9, and a depressedport-ion 11 on the side of the member which is provided with raisedportion 8. Thus the spacing devices will present a somewhat sinuouscross section tending to bend the buff wheel section reversely asindicated in Fig. 1 to hold it securely in proper position.

The raised portions 8 and 10 may be constructed to engage the bufl'wheel sections more tightly by providing gripping corners 12 and 13,which engage the material of the sections and hold them from shifting.

I prefer to construct the spacing devices of sheetmetal, which may bereadily stamped or pressed out into curved cross section, thus formingthe raised portions 8 and 10 and their complementary portions 9 and 11respectively, in one operation. In the present instance the raisedportions 8 and 10 are annular in form and concentric to centre hole 7.The gripping corners 12 and 13may be easily formed by cutting out piecesfrom the raised portion 8, and cutting notches in the circular edge ofthe spacing device as shown more particularly in Fig. 2.

I prefer to form the spacing device of metal which is resilient, forseveral reasons.

When buff wheels are made up of several sections as above described, itis sometimes desirable to have the working surface of the wheel compactand stiff, while inother instances a softer or more yielding workingsurface is desired. lVith resilient spacing devices of the abovecharacter, the spacing between the wheel sections can be varied to suitdiii'erent conditions, since by increasingthe lateral pressure byscrewing up the nut 3, the spacing devices are compressed, bringing thewheel sections closer together, and holding them so tightly that theworking face of the wheel is less yielding; and on the other hand, ifthe lateral pressure on sections is decreased the wheel sections arespaced a greater-distance and individual-sections will yield or givemore readily, resulting in a wheel of softer quality. Owing to itscurved cross section, the spacing device may be readily compressedwithout injury, the notches 13 permitting the same to assume readily aflatter shape with the corners 13 biting into the material of thesections to hold them more securely.

The resiliency of the spacing devices is also of advantage in relievingstrains on the wheel sections and spindle in 'use. For example, ifgthewheelis being used to bufl or polish corners, the operator may press thework more or less laterally against the wheel, tending to bendindividual sections into an oblique position, straining the shaft aswell as the centre holes of the sections. The resiliency of the spacingdevices is sufficient to take up and relieve these bending strainswithout releasing the sections, and the space ing devices form a cushionwhich brings the wheels sections back in the proper alinement as soon asthe lateral pressure is released.

The spacing of the wheel sections permits circulation of air between thesame, and, if desired, this cooling efiect may be increased by providinga recess 12 within the spindle 1 and opening into the space between sections, as by means of one or more holes 13 extending from the recess 12to the outside of spindle 1. The spacing devices are then constructed topermit the outward flow of air along the interior sides of the sections,the air being drawn in through recess 12, and thrown outwardly betweenthe sections by centrifugal efi'ect. With spacing devices of the formillustrated, the cross sectional shape leaves spaces between sectionsthrough which air may circulate, the recesses 12 permitting the air topass from the central portion of the spacing device to the depressedportion 9,

while the notches 13 permit the air to flow and said spacing devicehaving, means per-' mitting outward circulation of air between thesections from said recess.

2. Is combination a spindle, bufi' wheel sections carried thereby and aspacing device interposed between said sections, said spindle having arecess opening into the space between said sections to supply airthereto, and said spacing device having depressed portions onoppositesides thereof with apertures connecting said depressed portionsto permit of outward circulation of air between the sections from saidrecess.

3. A spacing device for buft' wheel sections comprising an annularmember having depressed portions on opposite sides thereof, and one ormore apertures extending between said depressed portions.

4. In combination, a plurality of bufi' wheel sections, and resilientspacing devices interposed therebetween, said spacing devices eachhaving complementary raised portions and depressions on opposite sidesthereof whereby the raised portion of a given spacing device forces theadjacent butt wheel section into the corresponding depressed portion ofan adjacent spacing device.

5. A spacing device for buff wheel sections comprising an annular memberhaving a raised annular portion on one side adapted to engage a side ofa buff wheel section, the corresponding portion of the remaining side ofsaid member being provided with a depressed annular portion adapted toreceive a side of a butt wheel section.

6. A spacing device for butt wheel sections comprising an annularresilient member having on both its sides raised portions adapted toengage the sides of a buff wheel section, and complementary depressedportions adapted to receive the sides of buflf wheel sections disposedon both sides of said member respectively opposite to the correspondingraised portions, said first-mentioned portions being provided withgripping corners adapted to oppose relative movement between the spacingdevice and bufi wheel sections.

7. A spacing device for buff wheel sec tions comprising an annular sheetmetal member curved in cross section to provide a raised annular portionon one side adapted to engage the side of a butt wheel and acomplementary depressed annular portion on the remaining side adapted toreceive a side of a butt wheel.

i A spacing device for buff wheel sections comprising an annular sheetmetal member curved in cross section to provide a raised portion on oneside adapted to engage the side of a built wheel and a complementarydepressed portion on the remaining side adapted to receive a side of abutt wheel, said raised portion having a part cut away to providegripping corners adapted to oppose relative movement between the spacing"effective width to be varied by change in lateral pressure.

10. A spacing device for buff wheel sections comprising an annular sheetmetal member curved in cross section to provide a raised annular portionon one side adapted to engage the side of a buff wheel and acomplementary depressed annular portion on the remaining side adapted toreceive a side of a butt wheel, another portion of said member beingalso reversely curved in cross section to provide raised and depressedportions on sides of the member respectively opposite to saidfirst-mentioned raised and depressed portions.

11. A spacing device for bufi' wheel sections comprising an annularsheet metal member curved in cross section to provide an annular raisedportion on one side adapted to engage a side of a buff wheel and-acomplementary annular depressed portion on the other side adapted toreceive a side of a butt wheel, said member being also reversely curvedto provide annular raised and depressed portions concentric with saidfirst-mentioned raised and depressed portions and on sides of the memberrespectively opposite thereto.

12. A spacing device for but? wheel sections comprising an annular sheetmetal member curved in cross section to provide an annular raisedportion on one side adapted to engage a side of a butt wheel and acomplementary annular depressed portion on the other side adapted toreceive a side of a butt wheel, said member being also re versely curvedto provide annular raised and depressed portions concentric with saidfirstmentioned raised and depressed portions and on sides of the memberrespectively opposite thereto, said member being resilient to permit itseffective width to be varied by change in lateral pressure.

13. A spacing device for bull wheel sections comprising an annularresilient sheet metal member curved in cross section to provide anannular raised portion on one side adapted to engage a side of a but?wheel and a complementary annular depressed portion on the other sideadapted to receive a side of a butt wheel, said member being alsoreversely curved at its adjacent outer edge to provide annular raisedand depressed portions concentric with said firstmentioned raised anddepressed portions and on sides of the member respectively oppo-.

site thereto, tapering notches being provided in the outer edges of saidmember, and parts of said first-mentioned annular raised portion beingcut away to provide apertures staggered with respect to said notches.

14. A spacing device for bufi' wheel sections comprising an annularmember having portions on its opposite sides adapted to engage sides ofbufi' whee-l sections, said member being shaped to be resilient topermit its effective width to be varied by change in lateral pressure.

tortable cross section to permit its efi'ectivelateral dimension to varyby lateral pressure whereby the clamping means may be adjusted to shiftthe wheel sections toward or away from each other.

In testimony that I claim the foregoing, I have hereunto set my handthis 8th day of September, 1921.

HENRY L. ZUCKER.

